Assessing individual and environmental sound pressure level and sound mapping in an Iranian safety shoes production factory in 2016 using Surfer V.13

Background: Noise is regarded as a major physical hazard in work environments. The current study aimed at investigating environmental sound pressure level and sound mapping in an Iranian safety shoes production factory in 2016 using Surfer V.13.Materials and methods: This cross-sectional, descriptive-analytical study was conducted among 3 units of a safety shoes production factor. Casella noise dosimeter (Cel-320) was used to measure individuals’ exposure to noise, while 450 Casella-Cel sound level meter (manufactured in England) was utilized to assess environmental sound pressure level. According to ISO 9612, A frequency distribution network using the slow mode velocity was exploited to conduct measurements. The collected data were then fed into Surfer V.13 to draw the isosonic map.Results: The results of assessing individuals’ exposure showed that workers in the cutting, stitching, and stuffing unit had excessive exposure to noise (over 85.76 dB which is the standard limit). The results of measuring environmental sound pressure level also showed that 32.3% of the measurement stations were located in the danger zone (with sound pressure levels greater than 85 dBA). The highest sound pressure levels measured in Lewis and lineage, injection, and cutting, stitching, and stuffing units were 88, 89, and 93 dB, respectivelyConclusion: Based on the obtained results, the cutting, stitching and stuffing is in dire need of engineering controls and working, trafficking, and stopping limitations.

Keywords:

Environmental sound pressure level , Surfer , safety shoes production factory , Iran